package com.sky.service.impl;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional(rollbackFor = Exception.class)// 默认是对运行时异常进行回滚  rollbackFor可以添加其他状态异常
    public void saveWithFlavor(DishDTO dishDTO) {
        // 将dishDTO中的属性复制到dish对象中
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);
        // 保存菜品的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            log.info("{}",dish.getId());
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dish.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> p = dishMapper.page(dishPageQueryDTO);
        return new PageResult(p.getTotal(), p.getResult());
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品数据
        Dish dish = dishMapper.getById(id);
        //查询菜品口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.listByDishId(id);
        //创建DishVO对象并封装数据
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //修改口味表-删除
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //修改口味表-添加
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dish.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 批量删除
     * 业务要求：删除菜品时，同时删除菜品的口味数据，菜品状态为起售时不能删除
     * @param ids
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteByIdBatch(List<Long> ids) {
        // 查询菜品状态是否能被删除
        for (Long id : ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus().equals(StatusConstant.ENABLE)){
                // 当前菜品状态为起售，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否被套餐关联
        List<Long> setmealIds =setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //批量删除菜品
        dishMapper.deleteByIdBatch(ids);
        //批量删除菜品口味
        dishFlavorMapper.deleteByIdBatch(ids);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    @Override
    //可能有错
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);
        List<DishVO> dishVOList =new ArrayList<>();
        for (Dish d : dishList) {
            DishVO dishVO=new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.listByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}
